"Exciting news: Claude Opus 5 with Max reasoning is #1 in the Frontend Code Arena and Text Arena with factuality on! Claude Opus 5 with default reasoning high is also very strong landing #3 in Frontend Code Arena, right behind Kimi K3 - and #2 in Text Arena (factuality on). This is real world..."
...data that @AnthropicAI 's newest model holds up on real world tasks: agentic web coding, document reasoning, and general chat capability. Claude Opus 5 Max’s score is still preliminary. We’ll continue to see how scores converge and share updates. Congrats to @AnthropicAI on the SOTA release! In the Text Arena, Claude Opus 5 with Max reasoning ranks #1 with factuality on.
Factuality is a new ranking that combines human preference with factual accuracy. We audit battles by sampling responses, extracting verifiable claims, and checking correctness head-to-head. Live More category findings to come as more votes and traces are collected. Dig into the latest leaderboard details at: https:// arena.ai/leaderboard/co de/webdev … — Arena.ai
Source: https://x.com/arena/status/2081831019377004727
Introducing Claude Opus 5.
It's a thoughtful and proactive model that comes close to the frontier intelligence of Fable 5 at half the price. https://t.co/GQWhcq2CQL — Claude